I'm not disagreeing with you, but I think in both those examples, the train crew had actually lost control of the situation? Due to the lack of, or misleading, information being given out by the train crew, those passengers who had been cooped up in very uncomfortable conditions only did what they felt was necessary to relieve the situation?
The point I was making is that having hermetically sealed carriages is fine - until something goes wrong! The option of pushing down a few carriage door windows, to counteract the air-conditioning either not working or pushing hot air around
if necessary, would perhaps avoid the need for anyone to smash windows?
